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March 13, 2019 06:32
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# Initally the file "git" was not exist in upper directory. | |
cat fullstack/upper/git | |
> No such file or directory | |
echo "I am a version control for both frontend and backend languages" union/git | |
# Once we perform modification,file gets copied from "lower" to "upper" layer. | |
# all the modification will take place in upper layer since it was the only | |
# layer which has write access. | |
cat fullstack/upper/git | |
> "I am a version control for both frontend and backend languages" | |
# Lower directory remains untouched | |
cat frontend/git | |
> "I am a version control for frontend languages." |
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